<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!-- 数据类型一定要和取出的json中的一致，
          否则没法回填 因此，这里value使用动态绑定的值，保证其数据类型是number
                 -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>
      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload"
                   @click="imagecropperShow=true">更换头像
        </el-button>
        <!-- v-show：是否显示上传组件 :key：类似于id，
        如果一个页面多个图片上传控件，可以做区分 :
        url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/eduoss/file'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>
      </el-form-item>


      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
  import teacherApi from '@/api/teacher'
  import ImageCropper from '@/components/ImageCropper'
  import PanThumb from '@/components/PanThumb'

  export default {
    components: { ImageCropper, PanThumb },
    data() {
      return {
        teacher: {
          name: '',
          sort: 0,
          level: 1,
          career: '',
          intro: '',
          avatar: ''
        },
        imagecropperShow: false,
        imagecropperKey: 0,
        BASE_API: process.env.BASE_API,
        saveBtnDisabled: false // 保存按钮是否禁用,
   }
   },

    created() {
      console.log('created')
      this.init();
    },

    watch:{
      $route(to,from){
        this.init();
      }
    },
      methods: {

       close(){
        this.imagecropperShow=false;
         //上传组件初始化
         this.imagecropperKey=this.imagecropperKey+1;
        },

        cropSuccess(data){
          this.imagecropperShow=false;
          this.teacher.avatar=data.url;
          this.imagecropperKey=this.imagecropperKey+1;
        },


      init(){
        if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.getInfo(id)
        }else{
          this.teacher={};
        }
      },

      saveOrUpdate() {
        this.saveBtnDisabled = true
        if (!this.teacher.id) {
          this.saveData()
        } else {
          this.updateData()
        }

      },
        //更新
        updateData() {
        this.saveBtnDisabled = true
          teacher.updateById(this.teacher).then(response => {
            return this.$message({
              type: 'success',
              message: '修改成功!'
            })
          }).then(resposne => {
            this.$router.push({ path: '/edu/teacher' })
          }).catch((response) => {
            // console.log(response)
            this.$message({
              type: 'error',
              message: '保存失败'
            })
          })
      },


          // 保存
      saveData() {
        teacherApi.addTeacher(this.teacher).then(response => {
          return this.$message({
            type: 'success',
            message: '保存成功!'
          })
        }).then(resposne => {
          this.$router.push({ path: '/teacher/table' })
        }).catch((response) => {
          // console.log(response)
          this.$message({
            type: 'error',
            message: '保存失败'
          })
        })
      },

      //根据讲师id获取信息
      getInfo(id){
        teacherApi.getTeacherInfo(id)
        .then(response =>{
          this.teacher=response.data.teacher;
        }).catch((response) => {
          this.$message({
            type: 'error',
            message: '获取数据失败'
          })
        })
      }
    }

  }


</script>

